SOW_NPS_GRSM10N_GPR_Survey.doc

FEDERAL HIGHWAY ADMINISTRATION

Eastern Federal Lands Highway Division

SCOPE OF WORK

PROJECT: NPS GRSM 10N(1)

Ground Penetrating Survey for Pavement Layer Thicknesses and Areas of Stripping on a Section of US-441 in Sevier County, Tennessee

I. PROJECT INFORMATION

A. INTRODUCTION

This Scope of Work (SOW) is to contract services for the Federal Highway Administration, Eastern Federal Lands Highway Division (EFLHD). The Consultant will conduct a Ground Penetrating Radar (GPR) survey, using specialized equipment, on a section of US-441, from Mile-Marker (MM) 12.4 to MM 14.8, in the Great Smoky Mountains National Park in Sevierville, TN.

B. SCOPE

This SOW is provided to the Consultant to conduct a GPR survey to determine pavement layer thicknesses, areas of stripping, and deeper (up to 10 ft) subsurface anomalies. The GPR collection shall consist of two GPR antennas; one antenna to determine the pavement layer thicknesses and to determine areas of stripping (a 1-GHz air horn antenna) and a second antenna for the deeper subsurface investigation. GPR collection will be done at driving-speed and resolve pavement layers down to 1 inch while penetrating the entire pavement section (bound and unbound pavement layers). GPS data is to be collected concurrently with the GPR data with a one meter horizontal accuracy.

GPR data is to be collected continuously and analyzed or processed at 5-foot intervals. The results of the pavement thickness data analysis should be presented in both tabular and graphical formats. The milepost, latitude, longitude, asphalt concrete pavement layer thicknesses, total asphalt concrete pavement thickness, and aggregate base layer thicknesses for the centerline of both lanes is to be provided in tabular format. A stripping and deeper subsurface anomalies investigation analyses should conducted with the results provided in tabular outputs with the locations and approximate dimensions of all identified areas. The report should also to include a summary of the data collection procedures and analysis method.

Along with the above report, the raw data files and any video of the GPR collection should be provided.

The Consultant is expected to explain his data collection, analysis and interpretation concepts and respond to any questions by EFLHD office in Sterling, VA.

II. DELIVERABLES

The Consultant will perform all work in accordance with AASHTO R 37, ASTM D4748, ASTM D6432, and generally accepted engineering and reporting practices for GPR work and data collection. The list of deliverables includes the followings:

1. Conduct GPR collection at driving-speed, with no traffic control. EFLHD to provide a shadow vehicle with strobe lights.

2. Collect and provide concurrent GPS data at a maximum one meter horizontal accuracy.

3. Draft report to EFLHD within 21 days following award.

4. Final report within 7 days following receipt of comments on the draft report.

5. Report should include the followings:

· Project photos – Document conditions and survey.

· Raw and processed GPR survey data files.

· Note range of accuracy for method used.

· Data interpretation with explanations.

· Imagery of data results produced.

· Methodology – including equipment specifications, field collection/processing parameters and discussion of data interpretation.

III. WORK PERFORMANCE SPECIFICATIONS, QUALITY STANDARDS AND REPORTING REQUIREMENTS Each product is expected to meet an Acceptable Quality Level (AQL) with respect to the thoroughness and appropriateness of the analyses and recommendations, the clarity of presentation, and the accuracy of the completed products. Conduct work according to the documents referenced in Section VI of this SOW, and satisfying any specific requirements of this SOW, ensuring they will meet the thoroughness, appropriateness and clarity criteria of the AQL. Where the Standard of Practice currently differs from this criteria, work should follow the current Standard of Practice. The Consultant should assure that work products are accurate and of high quality through an established and documented quality control and assurance process.

IV. COORDINATION REQUIREMENTS

Coordination will be required with the COR. All communications affecting the SOW and all coordination will be through the COR or alternate COR and per contract.

CONTRACTING OFFICER’S TECHNICAL REPRESENTATIVE & TECHNICAL EXPERTS

The primary Contracting Officer's Technical Representative (COR) will be:

Mr. Robert Hinman E-mail address is robert.hinman@dot.gov Address: Eastern Federal Lands Highway Division 21400 Ridgetop Circle Sterling, VA 20166 Contact number: (703) 948-3555 The alternative COR is: Mr. Mohammed Elias E-mail address is mohammed.elias@dot.gov

SCHEDULE

The design schedule for the contract work will be divided into the following work phases. The Government will review portion of each phase begins on the day of receipt of the package of deliverables. No adjustments will be made for delays caused by mailing.

Submit the draft report to the COR for review and comment within 21 days upon receiving the Notice to Proceed (NTP) from EFLHD. Transmit final reports to the COR within 7 days after review comments are received from the COR.

V. REPORTING REQUIREMENTS AND DELIVERABLES

The contract work and supporting documents will be created and delivered to the Government per the following formats:

A. ELECTRONIC TRANSFER OF DATA

The Government requires the following to ensure compatibility with software used by the Government and to ensure the efficient and timely exchange of computer files between the Government and the Consultant.

All files submitted must be fully compatible with the formats listed in this document without any conversion or editing by the Government. Any files requiring conversion and/or editing by the Government will not be accepted. All files shall be virus free.

For each Phase, all relevant files shall be provided in a format fully compatible, as appropriate, with the following:

· Word Processing

Microsoft Office Word

· Spreadsheets

Microsoft Office Excel

· Adobe Acrobat

Version 11.023 or newer

· Databases

Microsoft Office Access

· GPR files

.dzt, .bzx, .sgy, .s3d, .m3d, .b3d file types

· GPS files

.kml

B. COMPUTER FILE EXCHANGE MEDIA

Electronic files will be exchanged between the Government and the Consultant using the following media as appropriate for Windows Operating Systems:

1. EMAIL: Files 10 MB or smaller may be transferred via EMAIL. If compressed, the files should be self-extracting. Contact the COR for access information.

2. FTP site could be used to transmit large files. Coordinate with COR for ftp site link, user name, and temporary password.

VI. TECHNNICAL STANDARDS AND GUIDELINES

The baseline technical standards and guidelines to be used on this project are as follows.

1. ASTM Standard E620-18, “Standard Practice for Reporting Opinions of Scientific or Technical Experts”, ASTM International, West Conshohocken, PA, 2018, DOI: 10.1520/E0620-18, www.astm.org.

2. ASTM D6432-11, Standard Guide for Using the Surface Ground Penetrating Radar Method for Subsurface Investigation, ASTM International, West Conshohocken, PA, 2011, DOI: 10.1520/D6432-11, www.astm.org.

3. ASTM D4748-10(2015), Standard Test Method for Determining the Thickness of Bound Pavement Layers Using Short-Pulse Radar, ASTM International, West Conshohocken, PA, 2015, DOI: 10.1520/D4748-10R15, www.astm.org

4. AASHTO R37-04 (2018), Standard Practice for Application of Ground Penetrating Radar (GPR) to Highways, American Association of State and Highway Transportation Officials, Washington, DC, 2018.

While this list is not all-inclusive, the publications listed will provide the Consultant with enough information to understand and execute this scope of work.